The folder is in it's right place, but question is rather if the sessions doesn't work as they should. There are plenty of housekeepings for revcms, but I don't recommend using revcms at all tbh.
This could simply be that there is no database query for that function, you could just add one. Or the inventory is not reloading when you do. I think that PlusEMU saves some information locally until you actually logout, and then post that information to the database. I'm unsure tho.
Generally bad practice to just remove something because your code doesn't match the criteria, I would suggest taking the advice from @Sentinel and run the query he provided.
It's not even close to safe, it uses mysql_ syntax which makes it unsafe in all possible ways. Also BrainCMS is said to have some kind of possibility of exploits since he doesn't prepare all the data.
This looks like 1 of a couple of things. Either you don't have your IIS or Apache running on Port 80, or you are being ddosed. Or last but not least the port 80 or the IIS/Apache is not let through the firewalls.